A　new　binary　metal　hydrate　photocatalyst　CdSnO3·3H2O　was　synthesized　from　Cd(CH3COO)2　and　SnCl4·5H2O　via　a　facile　homogenous　precipitation　method.　The　photocatalytic　activities　of　samples　were　evaluated　by　the　photocatalytic　degradation　of　volatile　organic　compounds　(VOCs)　in　O2　gas　stream　under　ultraviolet　light　irradiation.　The　results　demonstrated　that　the　typical　CdSnO3·3H2O　sample　had　an　average　particle　size　of　about　16nm,　a　band　gap　of　4.4eV,　and　a　specific　surface　area　of　91.8m2g-1.　The　comparison　of　CdSnO3·3H2O　synthesized　at　different　pH　values　showed　that　the　photocatalytic　activities　of　CdSnO3·3H2O　synthesized　at　pH　7　and　8　were　higher　than　that　of　the　samples　synthesized　at　pH　6　and　9.　Contrast　to　commercial　P25-TiO2,　the　activity　of　this　new　photocatalyst　was　better.　The　conversion　ratio　of　benzene　was　about　45%　and　5%,　corresponding　to　the　mineralization　ratio　was　about　60%　and　25%,　respectively.　CdSnO3·3H2O　also　exhibited　high　photocatalytic　activities　towards　cyclohexane　and　acetone.　Then,　the　mechanism　of　the　reaction　on　the　new　photocatalyst　was　discussed.　Hence,　the　facile　synthesis　of　this　photocatalyst　and　its　outstanding　photocatalytic　performance　for　VOCs　are　favorable　to　its　potential　application　in　the　environmental　remedy　field.　©　2012　Elsevier　B.V.